1.实现ServletContextAware接口 2.声明成员属性:private ServletContext servletContext; 3.重写setServletContext方法this.servletContext = servletContext,为ServletContext 赋值 4.获取绝对路径String realPath = servletContext.getRealPath(path);
private ServletContext servletContext;
this.servletContext = servletContext
String realPath = servletContext.getRealPath(path);